Bobbin holder



oct 15, 1940. T. C. SAYLES mL 2,217,922

BOBBIN HOLDER Patented Oct. 15, 1940 UNITED STATES Bonnin nommav Theo C.Sayles and Henry E. Griemsmann, Elmira, N. Y., assignors, by mesneassignments, to

Bendix Aviation Corporation, Ind., a corporation of Delaware South Bend,i

Application April 27, 1938, Serial N0. 204,650

5 Claims. (Cl. 242130) The present invention relates to bobbin holdersfor spinning frames and the like and more particularly to an improveddetachable connection between a bobbin and a pendulous support.

On spinning frames having commercial forms of bobbin holders of thependulous type such as disclosed in the patent to Hasbrouck et al. No.2,038,286, the loaded bobbins are pressed onto the holder from below,and are held by a spring detent in the holder which expands within thebore of the bobbin and resists removal thereof. When this detent isformed as shown in said patent, considerable force is required to pressthe bobbin on the holder if the opening in the bobbin is so small as toclosely t the holder. On the other hand, if the bobbin opening isoversize, the detent spring must be quite stiff in order to prevent thebobbin from dropping off, particularly when the creel board is jarred bytheA forcible application of an adjacent bobbin. i

Since the sizes of the openings in commercial bobbins vary quite widely,it has been found necessary to employ such stiff detent springs to takecare of the oversize bobbins, that considerablev exertion is required ofthe operator to replace bobbins f having small openings. Moreover, incourse of time the detents wear the edges of the openings in thebobbins, which conduces to nonuniformity in the retaining actionthereof.

It is an object of the present. invention to provide a pendulous bobbinsupport having novel and improved retaining means for the bobbin.

It is another object to provide such a device in which the collapsing ofthe detent upon application of the bobbin to the support while providingthe necessary resistance to removal thereof.

It is a further object to provide such a device in which the action ofthe detent is substantially uniform irrespective of considerablevariation in the sizes of the openings in the bobbins.

It is another object to provide such a device'in` which the wear of theedges ofthe vopenings in embodiment of the invention, the section beingtaken Vsubstantially on the line I-I of Fig. 5, the

' parts being shown in operative position;

Fig. 2.is a similar view showing the parts of the bobbin holder in thepositions assumed at the 5 start of the application of a bobbin to theholder;

Fig.v 3 is a similar view showing the positions of the parts duringremoval of the bobbin from the holder;

Fig.'4 is a sectional detail showing the support- 10 ing engagement ofthe bobbin holder detent with n bobbins of various sizes; and- Fig. 5 isa section of the bobbin holder taken substantiallyon the line 5-5 ofFig. 1.

In Fig. 1 of the drawings there is illustrated a 15 creel board I, in avertical opening 2 of which isV mounted a bearing bolt"3 havingbearingcone 4 at its lower end provided with shoulder 5 which clamps adust cap B against a washer 1 on the lower side of the creel 'board'Iby` means of a 20 sleeve nut 8. i

A bobbin holder including acylindrical Abody portion 9 lis universallyswiveled to the bearing bolt 3 by means of ball bearings II bearing -onthe cone 4 and running in a race I2 mounted in the 25 upper end of thebody 9 and held in clamping engagement with an abutment and closure discI3 by spinning over the enlarged upper end of the holder body asindicated at Il.

Means are provided' for yieldably retaining a 30 bobbin on the bodymember 9 of the holder, this means beingin the form of a yielding detentmember I5 having bowed portions I6 projecting through slotted openingsI1 formed near lthe lower end of the bobbin holder body. 35

According to the presentinvention, the bowed portions I6 of the detentI5 are formed to facilitate the applicationof a bobbin to the holder,and to` resist the removal of the bobbin by a forcel which issubstantially constant irrespective of 40 considerable variations in thesize of the bore of the bobbin. As here shown, this is accomplished byforming the upper portions I8 of the bowed portions I 6 substantiallystraight, with a constant inclination to the `axis of the holder, and4.5A merging gradually into the body portion I9 of the detent as shownat 2 I. The lower portions 22 of the bowed portions I6 are alsosubstantially straight but are of a greater length than the portions I8:and thus have an inclination tothe axis 50 of the holder which is lessthan said inclination of the portions I8, and terminate in comparativelyabrupt shoulders 23 which normally engage the abutments 24 formed in thebobbin holder body 9 at the bottom of the slots I1. The detent 55supported on the inclined portions il of the desiderable initialpressure which causes the bowed portions Il to be projected forciblythrough the slots I 1 and thereby yieldingly maintain the detent in itsnormal longitudinal position in the bobbin holder.

In the operationof the device. initiallapplication of 4a. bobbin Il tothe holder causes the detent Ill to be pushed upwardly in the holder asshown in Fig. 2 4of the drawings whereby the shoulders 2t at the'upperends of the slots i1 in the bobbin holder body l engage the inclinedportions 2| and il of the detent. causing the detent to be collapsedsumciently to enter the bore Il of the bobbin, whereupon the bobbin isslid into operative position as shown in Fig. 1 where it is tent.downward movement of the detent in the holder being prevented by theengagement of shoulders 2l with abutments 2l.

When it is desired to remove the bobbin, downward force applied to thebobbin will cause initial collapsing movement of the detent Il byengagement cf the bobbin withthe inclined portions il thereof. thusdisengagins shoulders I8 from abutments 24. VIl'urther downward movementof the bobbin carries the detent with it as illustrated in Figi 8whereby the abutments Il engage the inclined portions 22 andcomplete thecollapsing of the detent suiiiciently to permit removal of the bobbin.whereupon the detent snaps up into its original position.

It will be seen-by reference more particularly to Pig. 4 of the drawingsthat bobbins 28a, IIb and llc having various sims of openings areretained by the detent with substantially uniform resistance to removalinasmuch as the inclination oi' the portion Il of the detent issubstantially constant so that the pressure on the bobbin necessary todisengage the shoulder 23 of the detent is substantially constantregardlessof the location of the engagement of the bobbin with th'edetent. It will further be noted that inas- .much as the collapsing ofthe detent is effected largely by the engagement of the shoulders orabutments 24 and 28 of the bobbin holder, the force necessary tocollapse the detent is quite uniform. and the attendant wear of the bore`of the bobbin is very small.

Although but one form -of the invention has been shown and described indetail, it will be understood that other forms are possible and thatvarious changes may be made in the design and arrangements of the partswithout departing from the spirit of the invention as defined in theclaims appended hereto.

What is claimed is:

l. In a vertical bobbin holder, a hollow cylindical body member havingdiametrically opposed slots adjacent the bottom thereof, and abifurcated expansive detent spring in said body member having. laterallyextending bowed portions protruding through said slots, each of saidbowed portions including a pair of substantially straight portions ofsubstantial length inclined to the axis of said holder in oppositedirections and merging together at a substantially common point.

2. In a bobbin holder, a hollow cylindrical body member, means forpendulously swiveling the body member from a creel board, and a yieldingdetent in the body member having laterally ex- 9,917,099 is is pissed m'the bobbin holder body under ntending bowedv portions pro outside saidbody member through slots provided in the `wall of said body membeaeachof said bowed portions including a pair of substantially straightportions of substantial length forming an angle,andcertainofssidstraightportionshavinganinclinationtotheaxisofsaidholdergreaterthan theinclinationtotheaxisoftheholder oicertsin other of said straight 3. In averticalbobbin holder, a hollow cylindrical body member having laterallyopposed openings. and a blfurcated expansive detentspringinsaidbodymemberhavingprojecting portionsv adjacent the ends ofthe furcations protruding through said openings. each of said projecting portions including a pair of substantially straight portions oi'substantial length inclined to the axis of said holder in oppositedirections and merging together at a substantially common point. certainoi' said straight portions merging gradually into the body of the springadjacent the upper 'edge of the corresponding opening, and certainothes` o! said straight portions terminating in abrupt shouldersadjacent the lower edge of tbe Opening.

4. Inabobbinholdenahollowcylindricalbody member having lsterallyypposedopenings adjacent the bottom thereof, means fo)F pendulously swivelingthe body member from a creel board,and aryielding detent insaidbodymember having laterally extending bowed portions projectingoutside said body member throughsaidopenineachoisaidbowedportionsincluding a pair oi' substantiallystraight portions oi'substantiallensthinclined tothe axis ot said holderin opposite directions and merging together at a substantially commonpoint, the body member having means adapted to engage said straightportions and collapse the detent responsive to longitudinal movement ofthe detent in the body member in either direction, and certain of saidstraight portions having means which engages the inner surface of saidbody member for retaining the detent in normal position.

5. In combination with a bobbin having an axial opening thereinconstricted to form a neck adjacent the upper end thereof, a bobbinholder having a hollowcylindricsl body adapted to enter said opening andhaving diametrically opposed slots adjacent the bottom thereof, and abifurcated expansive spring detent in said body having laterallyextending bowed portions protruding through said slots, each of saidbowed portions including a pair of substantially straight portions ofsubstantial length forming an angle, certain of said straight portionshaving an inclination to the axis of said holder greater than theincuriation to the axis o! said holder of certain other of said straightportions. said certain of said straight portions arranged to engage theinner edge of said neck with a substantially uniform resistance toremoval irrespective of variations in sise of said neck, and saidcertain of said straight portions merging gradually into the body oi'the spring adjacentv the upper edge of the correspond,

ing slot whereby upward pressure on said detent `causes said upper edgeto initiate the collapse of said detent with a high mechanicaladvantage.

